Detailed foraminiferal biostratigraphy of the Danish marine Miocene formations

摘要

The Miocene strata of eighteen boreholes from onshore Denmark have been investigated for their foraminiferal content. A dense sampling with intervals of about 0.5 metres has resulted in a very detailed biostratigraphy. Some of the boreholes were analyzed in detail, others just examined for similarities in the faunal pattern. It was possible to apply the established North Sea zonations in the present study, and owing to the dense sampling it has been possible to confirm, refine and improve these zonations. Hence, some of the established benthic zones can now be further subdivided. Furthermore, some substitute markers are introduced for as well the benthic as the planktic zonation. The chronostratigraphical allocation of the zones is reinterpreted in light of recent publications. The data showed several oscillations in the water depth during the Miocene and a correlation of these with the sequence stratigraphical framework of the Danish North Sea area is attempted. (au) (62 refs.)